US 12,129,602 B2
Multi-functional barrier coating for molded fiber containers
Mark R. Fisher, Appleton, WI (US); and Nicholas J. Sortedahl, Appleton, WI (US)
Assigned to Appvion, LLC, Appleton, WI (US)
Filed by Appvion, LLC, Appleton, WI (US)
Filed on Mar. 7, 2022, as Appl. No. 17/688,282.
Prior Publication US 2023/0279615 A1, Sep. 7, 2023
Int. Cl. D21J 1/08 (2006.01); B65D 25/14 (2006.01); C09D 7/20 (2018.01); C09D 7/61 (2018.01); C09D 129/04 (2006.01); D21H 19/40 (2006.01); D21H 19/60 (2006.01); D21H 19/62 (2006.01)
CPC D21J 1/08 (2013.01) [B65D 25/14 (2013.01); C09D 7/20 (2018.01); C09D 7/61 (2018.01); C09D 129/04 (2013.01); D21H 19/40 (2013.01); D21H 19/60 (2013.01); D21H 19/62 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A liquid coating composition, comprising:
a carboxylated polyvinyl alcohol (PVOH) copolymer;
an epichlorohydrin-based crosslinking resin; and
clay particles dispersed throughout the coating composition;
wherein the carboxylated PVOH copolymer, the crosslinking resin, and the clay particles together account for at least 90% of a dry solids content of the composition, and
wherein the composition consists essentially of the carboxylated PVOH copolymer, the crosslinking resin, and the clay particles.